Five aficionados of New York’s subterranean past will participate in a panel discussion that explores the history of the city’s literal “lower depths.” The participants include Julia Solis, author of New York Underground; Robert Sullivan, author of Rats: Observations on the History and Habitat of the City’s Most Unwanted Inhabitants; Chris Neville, lecturer for Place Matters on the Marble Cemetery; and Anne-Marie Cantwell and Diana diZerega Wall, authors of Unearthing Gotham: The Archaeology of New York City. This free event, sponsored by ASHP/CML, The Gotham Center, City Lore, and the Continuing Education program will take place on Monday, October 4th, at 6:30 in the Elebash Recital Hall of the CUNY Graduate Center, 365 Fifth Avenue.